1. Stanford University School of MedicineStanford, California
2. Vera Moulton Wall Center for Pulmonary Vascular DiseaseStanford, California
3. University of Mississippi School of MedicineJackson, Mississippi
4. Vero BiotechAtlanta, Georgia
5. Private Practice Long Beach, Californiaand
6. University of California Irvine Emergency MedicineOrange, California